Model Chrissy Teigen thinks she is a "cool mom" because she has had her family's birthdays tattooed on her arm.

Tiegen took to Instagram, where she shared a series of photographs flaunting her new tatoo.

In the first, she could be seen putting on a brave face while the work is being done, while the second picture featured a close-up of Daniel finishing off the piece, reports femalefirst.co.uk.

In the final photo, Chrissy showed off her new tattoo, which has the dates of her father Ron Teigen Sr., mother Vilailuck Teigen, husband John Legend and their children Luna, three, and Miles, 16 months.

She captioned the gallery: "Cool mom back at it again with @winterstone!"

Legend joked she'd only had the tattoo to remember the important dates in her household.

He commented: "The ultimate mnemonic device!"

This isn't the first time the 'Bring the Funny' host has paid tribute to her family with a tattoo. In April, she and Legend had matching cursive script on inscribed along the inside of their arms, with hers reading "John - Luna - Miles" and the "All of Me" hitmaker's featuring "Chrissy - Luna - Miles."